wannacry | bf492d47a992bd94b592475294ea6d8212b6453994410ddfd02df3f846c89d7b

Analysis

max time kernel
150s
max time network
155s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
02-07-2024 20:19

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General

Target

bf492d47a992bd94b592475294ea6d8212b6453994410ddfd02df3f846c89d7b.dll
Size

5.0MB
MD5

8f5f1d37d83139fe1faa73bf4ae4de4e
SHA1

4f1297aade1ae53e49a118bc74e02b008edd3d0d
SHA256

bf492d47a992bd94b592475294ea6d8212b6453994410ddfd02df3f846c89d7b
SHA512

e8d2fed8005d71fffcf522b8eca2a533fff57126a9b05bf6737e7489c8cddbd17d80bf55940cd08512c0a58477a5149e6b7f4b2801fbaaa6500bec8be9cca97c
SSDEEP

49152:SnjQqMSPbcBVQejJ1INRx+TSqTdX1HkQo6SAARdhnvxJM7:+8qPoBhF1aRxcSUDk36SAEdhvxW7

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3234) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Executes dropped EXE 3 IoCs

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

1984 mssecsvc.exe
2704 mssecsvc.exe
3036 tasksche.exe
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

pid	process
1984	mssecsvc.exe
2704	mssecsvc.exe
3036	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe
Modifies data under HKEY_USERS 1 IoCs

Processes:

mssecsvc.exe

description ioc process

Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings mssecsvc.exe

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1688 wrote to memory of 1992	1688	rundll32.exe	rundll32.exe
PID 1688 wrote to memory of 1992	1688	rundll32.exe	rundll32.exe
PID 1688 wrote to memory of 1992	1688	rundll32.exe	rundll32.exe
PID 1688 wrote to memory of 1992	1688	rundll32.exe	rundll32.exe
PID 1688 wrote to memory of 1992	1688	rundll32.exe	rundll32.exe
PID 1688 wrote to memory of 1992	1688	rundll32.exe	rundll32.exe
PID 1688 wrote to memory of 1992	1688	rundll32.exe	rundll32.exe
PID 1992 wrote to memory of 1984	1992	rundll32.exe	mssecsvc.exe
PID 1992 wrote to memory of 1984	1992	rundll32.exe	mssecsvc.exe
PID 1992 wrote to memory of 1984	1992	rundll32.exe	mssecsvc.exe
PID 1992 wrote to memory of 1984	1992	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bf492d47a992bd94b592475294ea6d8212b6453994410ddfd02df3f846c89d7b.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1688

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bf492d47a992bd94b592475294ea6d8212b6453994410ddfd02df3f846c89d7b.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1992

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1984

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3036

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2704

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
20f2e886b997616ea7495f3757aee635

SHA1
12989bcb971419a8d36c43abe48ba3f280813072

SHA256
b595e1e6d916498bf01f58b1c90160d92f30f296e83e51fd51a99f5bfdb14f8f

SHA512
3c5a8e1f85cff20526c48b1031221481b5aa3b705784202d965f45de1b70b1aab400aab088e5fbbee260850830e6dd3c5af1817f43d3933f0fccb5102ae825b2

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
88ad0d2c4021347727ef36b1e508a914

SHA1
76d08413d8ffcfd3ac59bb04cee93542339cadb8

SHA256
f42c82f2403d1ed88eb50ce9f1abcbd1a9a61a527f92302a437afb3142ac5274

SHA512
0f410289b62830d376095bbf1719565c613af8fbdc8c9ab8caf1b557fb159258c3717371eb0463248885e093dcd2c6c9ef7ab6c1e8b00ee1305b95aca9f54ea6

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